Machine for pulling tacks.



H. LYON.

MACHINE FOR PULLING TACKS. APPLICATION FILED IAN.. I4. I9Io.

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H. LYON.

MACHINE FOR PULLING TA CKS. APPLICATION vHm) JAN. 14, 1910 Patented NOV. 30, 1915.

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. hold it between the jaws,

parra 'rane ATENT 'HARRY LYON, OF BROCKTON, MASSACHUSETTS, SSIGNOR, BY MESNE ASSIGNMENTS, TO UNITED SHOE MACHINERY COMPANY, 0E PATERSON, NEW JERSEY, A CORPORA- TION 0F NEW JERSEY.

Specification of Letters Patent.

Patented Nov. 30, 1915.

Application filed January 14, 1910. Serial No. 538,070.

To all whom 'it may concern.'

Be it known that I, HARRY LYON, a citizen of the United States, residing at Brockton, in the county of Plymouth and State of Massachusetts, have invented certain new and useful Improvements in Machines for Pulling Tacks, of which thefollowing is a speciiication.

This invention relates to machines for pulling tacks, and more particularly to ma-v' chines for pulling the tacks employed in temporarily securing lasted uppers to the innersoles of shoes.

An object of the present invention is to provide a machine for the above stated purpose which shall comprise as few parts as possible, consistent with efficiency in operawhere these parts shall be so organized that tacks may be extracted with great rapidity 'and precision from a lasted shoe or any other object containing tacks which may be presented to the machine. In furtherance of this object, the machine which l have selected for illustration ofthe invention is provided with two tackpulhng jaws, and with actuating mechanism for the jaws which is constructed and arranged to impart kfirst a simultaneous downward movement thereto, then an inward movementto one of the jaws in a direction toward the other jaw whereby to engage a tack and then a simulta-k neous upward movement of the jaws to pull the tack, and finally a movement of one jaw away from the other to release the tack, these several movements being all performed in a positivel manner, and in very rapid succes sion.

Another object ofthe invention is to providean improved means for guiding each tack, astheshoe is fed along by the operator, soas to locate the tack accurately in position to be gripped by the jaws as they approach the work and to be pulled from the Vlasted upper thereby. This means preferably comprises a guide which 1s constructed. to rest upon the shoe, or other obj ect containing the tacks to vbe extracted, and has a forward edge so arranged as to enga-ge the ltack below itshead and locate it in proper longitudinal relation to the jaws, as-well. as toA act@ as a downhold, for the shoe, saidguide having, furthermore, other means, as an lupstandingflange or member, along which the jaws. are to be guided and which serves to locate the tack in proper lateral relation thereto'.v j

Other features of the invention, including improved details of construction and combi-y nations of parts, will be hereinafter more particularly described and claimed. i

kIn the drawings: Figure 1 is a longitudinal sectional view, on the line 1-1, Fig.v2, of a machine embodying'the present invention, the principal operating parts being shown inelevation. Fig. 2 is a horizontal sectional view of said machine on thelinc 2,-2, Fig. 1. Fig. 8 is a detail view of some of the'parts illustrated in Fig. 1, showing the jaws in taclcengaging position. Fig.V 4 is a perspective view of the guiding device, and Fig. 5 is a detail, illustrating the relationof the jaws to the guiding device.

The machine frame, 1, which may either be forked at` the upperend or comprise two standards, as desired, is preferably arranged to support two spaced bearings 2, for containing a rotatable power shaft 3 to which is fast a pulley 10, or other equivalent means( for receivingv power from. a suitable source. Extending from a rigid part of lthe frame 1 as, for instance, the rear bearing 2, is an arm i which is shown as beingper-l forated to receive a pivot bolt 16. This bolt 16 is preferably reduced at the end 20 which passes through the arm 4 to provide a shoulder, and saidend is externally screw-thread ed to receive a nut 21, which clamps the bolt rigidly to the arm 4. of the frame. The outer end of the bolt 16 may have a head 18, as shown, and said bolt is received within a longitudinal bore of the sleeved extension 23 of an arm 25, for which arm it forms a pivotal sup-port, the bore of the sleeve being enlarged at its outer end to fit the head 18, as shown. The arm 25 is formed or provided near its outer extremity with a rigid, inwardly curved jaw 27, and is furthermore formed with a longitudinal recess or groove to receive a slide 29, which has a rigid, outwardly curved jaw 30 of substantially the same formation as the jaw 27, but oppositely arranged thereto, and adapted to move against; the'jaw 27 for gripping a tack, or

to move away from it for releasing the tack, as the slide 29 is reciprocated in the recess of the arm 25 by mechanism to be described hereinafter. lThe slide is confined within the recess by a detachable cover 31.

VArn eccentric 7, which is fast to the shaft 3, has a strap 8, carrying an arm 9, which may be pivotally connected by a stud or pin 12 to one end of a lever 5. The lever 5 is fulcrumed by a pin 15 to a standard 4, carried by the frame 1, and at its outer end has pivotal connection through a pin 13 with one end of a link 17, whose opposite end is joined by a pivot pin 19 to the arm 25. By the` mechanism described, it will be seen that as the shaft y3 rotates the eccentric will impart to the arm 25, and hence to the tack-pulling jaws 27 and 30, oscillating movements about the pivot pin 1S as a center, to carry the jaws toward and from the work. A cam disk 37, which is fast to the shaft 2, is shown as having formed therein a cam way or groove 35, comprising two concentric portion 35a and 35h, that designated as 30a being located a greater distance Jr'rom the center of the shaft 2 than that designated as 35h, as illustrated by dotted lines in Fig. 1. The slide 29 carries a cam roll 33 which engages this cam groove, .and from this construction and arrangement of parts it follows that upon rotation of the cam disk 37 reciprocating movements will be imparted to the slide to cause the jaw 30 to approach the jaw 27 and to recedetherefrom in order Vto grip and release a tack. n

An arm 39, which is herein represented as an extension of the arm 4 but may be any rigid supporting member suitably connected to the frame of the machine, is arranged, as shown in Fig. 1, to provide avsurface to which may be connected by screws, or other suitable means, a plate 40 having a downwardly curved extension or arm 42, which supports an upwardly extending web or flange 44. Said arm terminates in an edge at 46 which is designed to form a stop or abutment for each tack as the shoe is moved along by the operator, and together with the iiange 44 serves to accurately position the tacks beneath the tack-pulling jaws. rlhe arm 42 also acts to hold the shoe against the force exerted in an upward direction by the machine as the tacks are being withdrawn from the last.

1n the operation of the machine, the parts may first be considered as occupying the severalpositions shown in Fig. 1, where the portion 35a of the cam groove is at its highest point-above the shaft, and the eccentric 7 at its low dead point, whereby the outer end of lever 5 and the arm 25 carrying the tackengaging jaws areelevated to their maximum height and the cam roll 33 has just entered the portion 35b of the cam groove and moved the jaw 30 its greatest distance and that from the jaw 27. A lasted shoe having therein the usual lasting tacks being now presented to the machine, one or' the tacks is positioned in the angle formed between the edge 46 and the flange 44, with said edge below the head of the tack as shown in Fig. 1, and power is applied to the shaft 3 to rotate it in the direction indicated by the arrow. The eccentric and connections therefrom to the arm 25 will then cause the jaws to move downwardly over the tack and when they have nearly reached the tack the jaws will be truly guided to the position which the tack occupies by the flange 44, along which they move. At or near the termination of such downward movement the roll 33 willl enter the portion 35n of the cam way, and be moved outwardly to cause jaw 30 to approach jaw 27 in a direction, approximately, at right angles to that of the downward movement of said jaws, thereby gripping the tack, as shown in Fig. 3. Upon further rotation of the shaft, the eccentric will act to raise the arm 25 and the jaws cai'- ried thereby to pull the tack from the last, the mechanism being so timed that the jaw 30 will be moved away from the liXed jaw at a pointnear the termination of the upward movement of the jaws as the cam roll again passes into the portion 35b order to release the tack. The machine will repeat this cycle of operations as each additional tack is withdrawn from the last.

1t will be seen then that the machine has a relatively small number of operating parts, while the jaw 27 moves in the path of the are of a circle generated from the pivot bolt 16, the jaw 30 moves downwardly, outwardly, upwardly and inwardly, in the order named, the paths of the two jaws being indicated by dotted lines in Fig'l. 1t will also be seen that the mechanism for imparting the described movements to the jaws is positive in its action, whereby to grip the tack, to pull it from the last, and to instantly release it at the termination of each pulling movement. Y

Having thus described my invention, what 1 claim as new and desire to secure by Letters Patent of the United States is 1. A tack pulling machine, comprising a pair of coperating tack pulling jaws, mechanism for continuously oscillating both of the jaws to move them toward and from the shoe, and mechanism for moving a single jaw only toward the coperating jaw to engage and grip a tack when the two jaws have substantially reached the limit of movement toward the shoe.

2. A tack pulling machine having, in combination, a pivotally sustained carrier provided with a jaw, a coperating jaw arranged to slide on said carrier, means for actuating the carrier to move both jaws toward and from a tack, and actuating mechaof the groove, in

nism constructed and arranged to cause said jaws to engage opposite sides of a tack and pull the tack.

3. A tack pulling machine having, in combination, a pivotally sustained carrier provided with a jaw, a second jaw arranged for reciprocating movements in said carrier toward and from the rst-named jaw to grip and release a tack, means for imparting oscillating movements to the carrier, and means for imparting reciprocating movements to the last-named jaw.

4. A tack pulling machinehaving, in combination, a pivotally sustained arm provided with a recess and a rigid j aw, a slide mounted for movement in said recess and provided with a cooperating jaw, means for oscillating said carrier to position the aws over a tack and to cause them to pull the tack, and

.means for reciprocating said slide to cause the jaws to engage and release the tack.

5. A tack pulling machine having, in combination, a pivotally sustained arm provided with a rigid jaw, means including an eccentric and connections :tor oscillating' said arm, a slide supported for movements on said arm and provided with a cooperating jaw and a cam roll, and a cam having a way therein to engage and actuate said roll in timed relation to the operation of said eccentric, said parts being constructed and arranged whereby the jaws are simultaneously positioned over a tack, the last-named jaw `is moved to to engage and pull a tack, in combination with an arm arranged to rest on the shoe and constructed with a forward edge and an upwardly extending flange for locating a tack relatively to said jaws, said flange being arranged to guide the jaws as they approach gripping position.

S. A tack pulling machine having, in com- Vbination, cooperating jaws supported for swinging movements toward and from the work to engage opposite sides of a tack, and mechanism to impart such movements to the jaws and to impart tack-engaging and tackreleasing movements to one relatively to the other of said jaws.

In testimony whereof I aiX my signature in presence of two witnesses.

HARRY LYON.

Witnesses: Y H. C. HOBART, EVERETT M. ATWooD.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner Vor Patents,

Washington, D. C. 

